<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<script type="text/javascript">
var hello = {};

alert(hello.t);
	if(typeof hello.t != 'undefinded'){
		alert("aaaaaaaaaaaaa");
	}
</script>
<body>

</body>
</html>